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Shall We Resect the Tip of Manubrium Mallei in Tympanoplasty?
Ahmet Kutluhan,Gökhan Yalçıner,Gülnur Güler,Kemal Kösemehmetog(lu,Kazım Bozdemir,Akif Sinan Bilgen 대한이비인후과학회 2011 Clinical and Experimental Otorhinolaryngology Vol.4 No.1
Objectives. In tympanoplasty operations if perforation is related with malleus handle, malleus handle is desepithelised. We planned this research to investigate whether the epithelial remnants remain as a result of this desepithelisation or not. Methods. The 35 patients who were performed tympanoplasty operation were divided into two groups. In the first group which included 13 patients the tip portion of manubrium mallei were cut off without desepithelisation. In the second group which included 22 patients the tip portions of manubrium mallei were cut off after the meticulous desepithelisation. The presence of squamous epithelium was examined histopathologically on the specimens. Results. Squamous epithelium was observed in 9 of the 13 non-desepithelised specimens and in 6 of 22 desepithelised specimens. Conclusion. In tympanoplasty operations despite careful desepithelisation, squamous epithelial remnants may remain on the malleus handle. So the tip of manubrium mallei could be resected to prevent the future development of cholesteatoma.
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Hakan A. Kamiloğlu,Kutluhan Kurucu,Dilek Akbaş 대한토목학회 2024 KSCE Journal of Civil Engineering Vol.28 No.2
This study investigates the stabilization of silty soil using alkali-activated fly ash and fibers with lengths of 3 mm and 12 mm. The study examines the effects of hybrid fiber length, fiber content, fly ash content, and activator content on the mechanical properties of the geopolymer-stabilized samples. The objectives of this paper are 1) to examine the effect of activator content and fly ash content on the UCS, Al/Si ratio, and SiO2/Na2O ratio of the stabilized samples using a statistical approach, 2) to investigate the effect of hybrid fiber length on UCS, secant modulus, flexural strength, toughness, and flexural load-deformation characteristics of the stabilized soil. A statistical approach was employed to investigate the relationship between fly ash content, alkali activator content, and UCS value. Optimal fly ash content and alkali activator content were determined based on the statistical model. The geopolymer structure of the stabilized soil was characterized via SEM, EDS, XRD, and FTIR analyses. The effects of fly ash and alkali activator content on UCS, Al/Si ratio, and SiO2/Na2O ratio were determined using the derived statistical model. The study demonstrated that activator content, a critical factor in compaction, significantly influences the UCS value, as much as the effect of the Si/Al and SiO2/Na2O ratios. Additionally, variations in fly ash content led to an increase in the UCS value of up to 15%. Moreover, changing the activator content resulted in a maximum 12-fold increase in UCS value. Incorporating hybrid fibers for stabilization led to higher secant modulus (up to 30%), flexural strength (up to 6%), and ductility without compromising UCS.
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Ozlem Elibol,Kadihan Yalcin Safak,Ayse Buz,Bilal Eryildirim,Kutluhan Erdem,Kemal Sarica 대한비뇨의학회 2017 Investigative and Clinical Urology Vol.58 No.5
Purpose: To determine the predictive value of certain radiological parameters for an objective asssessment of the presence of ureteral stone impaction. Materials and Methods: Seventy-nine patients with a single proximal ureteral stones were retrieved from the departmental database. Both clinical and particularly radiological data of all cases were well evaluated on this aspect. In addition to the time period between the first colic attack and definitive management; diameter of proximal ureter and renal pelvis, longitudinal and transverse stone size, Hounsfied unit (HU) of the stone and lastly ureteral wall thickness at the impacted stone site were all carefully evaluated and noted. Results: Patients had a single proximal ureteral stone. While mean age of the cases was ranged 20 to 78 years; mean stone size was 15.62±4.26 mm. Evaluation of our data demonstrated that although there was a statistically significant correlation between ureteral wall thickness and patients age, transverse diameter of the stone, ureteral diameter just proximal to the stone, renal pelvic diameter and the duration of renal colic attacks; no correlation could be demonstrated between patients sex and the HU of the stone. Conclusions: Prediction of the presence and degree of proximal ureteral stone impaction is a challenging issue and our data indicated a highly significant correlation between ureteral wall thickness and the some certain radiological as well as clinical parameters evaluated which will give an objective information about the presence of impaction which may in turn be helpful in the follow-up and also management plans of such calculi.
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Is Retinal Nerve Fiber Layer Thickness Change Related to Headache Lateralization in Migraine?
Alime Gunes,Seden Demirci,Levent Tok,Ozlem Tok,Serpil Demirci,Sü,leyman Kutluhan 대한안과학회 2016 Korean Journal of Ophthalmology Vol.30 No.2
Purpose: To evaluate retinal nerve fiber layer (RNFL) thickness in migraine patients with unilateral headache. Methods: A total of 58 patients diagnosed with migraine headache consistently occurring on the same side and 58 age- and sex-matched healthy subjects were evaluated in this cross-sectional study. RNFL thickness was measured using spectral-domain optical coherence tomography, and the side with the headache was compared with the contralateral side as well as with the results of healthy subjects. Results: The mean patient age was 33.05 ± 8.83 years, and that of the healthy subjects was 31.44 ± 8.64 years (p = 0.32). The mean duration of disease was 10.29 ± 9.03 years. The average and nasal RNFL thicknesses were significantly thinner on the side of headache and on the contralateral side compared to control eyes (p< 0.05, for all). Thinning was higher on the side of the headache compared to the contralateral side; however, this difference was not statistically significant. Conclusions: The RNFL thicknesses were thinner on the side of the headache compared to the contralateral side in the migraine patients with unilateral headache, but this difference was not statistically significant.
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